21121201112002 has 4 divisors (see below), whose sum is σ = 31681801668006. Its totient is φ = 10560600556000.

The previous prime is 21121201111951. The next prime is 21121201112027. The reversal of 21121201112002 is 20021110212112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13628493839041 + 7492707272961 = 3691679^2 + 2737281^2 .

It is a super-2 number, since 2×21121201112002² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280300277999 + ... + 5280300278002.

Almost surely, 2^{21121201112002} is an apocalyptic number.

21121201112002 is a deficient number, since it is larger than the sum of its proper divisors (10560600556004).

21121201112002 is a wasteful number, since it uses less digits than its factorization.

21121201112002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10560600556003.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21121201112002 its reverse (20021110212112), we get a palindrome (41142311324114).

The spelling of 21121201112002 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred one million, one hundred twelve thousand, two".